package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    //菜品分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        List<DishVO> list = dishMapper.pageQuery(dishPageQueryDTO);
        Page<DishVO> page = (Page<DishVO>) list;
        return new PageResult(page.getTotal(), page.getResult());
    }

    //菜品起售、停售
    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status, id);
    }

    //新增菜品
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("新增菜品:{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.save(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    //批量删除菜品
    @Override
    @Transactional
    public void deleteById(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            Integer status = dish.getStatus();
            if (status == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
            if(setmealIds != null && setmealIds.size() > 0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
            for(Long id : ids){
                dishMapper.deleteById(id);
                dishFlavorMapper.deleteById(id);
            }
    }
    //根据分类id查询菜品
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }
    //修改菜品
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        Long dishId = dish.getId();
        dishFlavorMapper.deleteById(dishId);
        List<DishFlavor> flavors = dishDTO.getFlavors();
        flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
        dishFlavorMapper.insertBatch(flavors);

    }
    //根据分类id查询菜品
    @Override
    public List<Dish> selectList(Long categoryId) {
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        return dishMapper.selectList(dish);
    }
}
